Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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One is 6gb sas and the other is 12gb.
You probably won't notice a difference
Honestly, are there any HDDs that can really reach 6gb/s speeds? I haven't seen any that could reach 3gb/s. My current array is all running on SATA-2 backplanes, but with 8 drives in the raid it clocks out at 460MB/s sustained (bytes, not bits). Considering my previous NAS could barely reach 70MB/s on a 6-disk array, I was quite pleased with the new setup.
12gbps could be useful if you use port expanders to put dozens of drives on the same port, but without a port expander you're right you wouldn't saturate the 6gbps channel.
Imagine a disk shelf of 24 drives being connected by a pair of sas loops. You'd want the faster speeds then. It's not about individual drives.